Hi Jeff,
I'd appreciate if you have some knowledge on how to use grabber tool with wand using ppt-tracking and wand 2014? Few more questions: What are proxy tools? What is the proxywrapper/grabberwrapper, their functions and what does the following code snippet from box stacker demo code do?

You can add a grabber tool and map the wand input signals to the grabber functions in vizconnect. The vizconnect avatars and tools tutorial covers this topic using a desktop setup but the same concepts apply if you're using PPT tracking and wand. The proxy tool is used with the demo launcher as a placeholder tool. This is most likely unnecessary for your application but a description of the proxy tool is shown when you select it in the vizconnect > tools dialog.